函数f(x)=5x2-2x的单调增区间为( ) A.(15,+∞) B.(-∞,15

题型:选择题

问题:

函数f(x)=5x2-2x的单调增区间为(  )
A.(
1
5
,+∞)
B.(-∞,
1
5
)
C.(-
1
5
,+∞)
D.(-8,-
1
5
)
考点:二次函数的性质及应用
题型:选择题

The news _____ the spaceship succeeded in returning to the earth spread everywhere.

A.that

B.which

C.whether

D.what

题型:选择题

患者,男,务农。颈后长疖2周,患处红、肿、痛,按压患处皮肤软有波动感。口服、肌注抗生素治疗,症状缓解不明显。根据患者目前情况,首选何种治疗方法缓解症状最快()。

A.紫外线

B.短波

C.患处切开引流

D.微波

E.毫米波

题型:选择题

1) ______ the Oral Approach
2) ______ the Cognitive Approach
3) ______ the Communicative Approach
4) ______ the Audiolingnal Method
5) ______ the Direct Method
a) The use of drills and pattern practice is one of its distinctive features.
b) The practice techniques adopted in this approach generally consists of guided repetition and substitution activity.
c) Written work should be graded.
d) Role play and simulation activities are often thought to be one of the most effective ways of integrating language skills in the language classroom.
e) It seeks the intellectual understanding by the learner of the language as a system.

题型:选择题

比色池有石英与玻璃两种?如何选择使用?

题型:选择题

对噪声作业工人听力检查,哪个频率听力下降≥30dB为听力损伤

A.3000Hz
B.2000Hz
C.1000Hz
D.500Hz
E.100Hz

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